25505441 has 4 divisors (see below), whose sum is σ = 27467412. Its totient is φ = 23543472.

The previous prime is 25505419. The next prime is 25505449. The reversal of 25505441 is 14450552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6145441 + 19360000 = 2479^2 + 4400^2 .

It is a cyclic number.

It is not a de Polignac number, because 25505441 - 2⁶ = 25505377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25505441.

It is not an unprimeable number, because it can be changed into a prime (25505449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980966 + ... + 980991.

It is an arithmetic number, because the mean of its divisors is an integer number (6866853).

Almost surely, 2^25505441 is an apocalyptic number.

It is an amenable number.

25505441 is a deficient number, since it is larger than the sum of its proper divisors (1961971).

25505441 is a wasteful number, since it uses less digits than its factorization.

25505441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961970.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 25505441 is about 5050.2911797242. The cubic root of 25505441 is about 294.3591989241.

Adding to 25505441 its reverse (14450552), we get a palindrome (39955993).

The spelling of 25505441 in words is "twenty-five million, five hundred five thousand, four hundred forty-one".